{"id":357079,"date":"2024-03-14T11:50:08","date_gmt":"2024-03-14T11:50:08","guid":{"rendered":"\/forum\/?post_type=topic&#038;p=357079"},"modified":"2024-03-14T11:50:08","modified_gmt":"2024-03-14T11:50:08","slug":"optimization-in-lumerical-fdtd","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/optimization-in-lumerical-fdtd\/","title":{"rendered":"Optimization in Lumerical FDTD \u200f"},"content":{"rendered":"<div dir=\"ltr\">Dear Sir\/ Madam,<\/div>\n<div dir=\"ltr\">I&#8217;m currently working on a periodic structure consisting of two waveguides with grating, in FDTD using Bloch boundary condition.<\/div>\n<div dir=\"ltr\">I want to do an optimization on the waveguides&#8217; and gratings&#8217; parameters in order to get some feature in the dispersion relation.<\/div>\n<div dir=\"ltr\">I would like that my cost function will be a function of the <strong>eigenvectors<\/strong> of the <strong>transfer matrix<\/strong> of a unit cell of the structure (which depends on the waveguides parameters). I wasn&#8217;t able to find how to do a simulation with optimization that its cost function is related to the eigenvector. Is there a feasible approach to accomplish this task?<\/div>\n<div dir=\"ltr\">I appreciate your help,<\/div>\n<div dir=\"ltr\">Kessem<\/div>\n","protected":false},"template":"","class_list":["post-357079","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Dear Sir\/ Madam,I&#039;m currently working on a periodic structure consisting of two waveguides with grating, in FDTD using Bloch boundary condition.I want to do an optimization on the waveguides&#039; and gratings&#039; parameters in order to get some feature in the dispersion relation.I would like that my cost function will be a function of the eigenvectors\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/optimization-in-lumerical-fdtd\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO 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